![background image](http://html.mh-extra.com/html/omron/cj1w-pnt21/cj1w-pnt21_operation-manuals_742351097.webp)
3 Configuration Software
3-26
CJ-series PROFINET IO Controller Unit Operation Manual for NJ-series CPU Unit (W511)
The IO Device Area displays the mapping of the I/O data of the allocated IO Devices onto the CPU
memory areas. The mapping can be made automatically or be changed by the user prior to down-
loading.
The figure below shows the IO Device Area, more in particular the Output Allocation tab.
Allocation Areas
The IO Device Area allocation tabs define how the I/O data of each of the slave devices is mapped
onto the CPU memory. The Slave area tab contains two tabs, one for Output Allocation and one for
Input Allocation. Each tab contains an overall module list showing all the output or input data per
slave, along with the Module names, sizes, data types and start addresses. This data is transferred
to the Master DTM by each of the allocated slave DTMs. If no IO Devices have been allocated or
configured the list will be empty.
Module List
The Module List Box list contains the following information (the table applies to the lists in the Input
and Output Allocation tabs, see also the above figure).
I/O Mapping
Each Output/Input Allocation tab also contains two areas onto which the I/O data can be mapped.
The areas are subsequently mapped onto the CPU memory. By default all data is mapped to Area 1,
in ascending order of the IO Device Number.
IO Device Area
Column
Description
Device No.
The Device No. is the number used by the PROFINET IO Controller DTM to
reference the IO Device within the configuration.
Device Name
The Device Name is the name assigned to the IO Device to which this I/O
data belongs to.
Slot
The Slot number is the position in which this particular module is inserted.
The information is supplied by the IO Device DTM.
Device Type
The Device Type is supplied by the IO Device DTM.
Module Type
The Module Type is supplied by the IO Device DTM.
Size
The Size of the module.
Type
The Data type of the module.
Address
The Address is the CPU Address with which the I/O Data of the module is
exchanged.